Effect of strain rate on the compressive behaviour of a Zr56Al10.9Ni4.6Cu27.8Nb0.7 bulk metallic glass

We report the study of the effect of strain rate on the compressive behaviour of a Zr₅₆Al_10.9Ni_4.6Cu_27.8Nb_0.7 bulk metallic glass. The results indicated that both the strength and plasticity of the glass increase with increasing the strain rate up to 10^?5 s^?1, above which the strength and plasticity start to decrease. The enhanced mechanical properties under a strain rate of 10^?5 s^?1 are due to the emission/propagation rate of the shear bands being consistent with the strain rate.     

A theory of work softening

Observed features of the yield drop in work softening support the view that the structure in a slip band is heterogeneous in a metal such as aluminium or copper. The centre of the band is almost empty of dislocations. These are concentrated round its boundary, particularly as walls of edge dipoles at its ends. It is argued that work hardening is due to the prevention of the passage of these dislocations by a forest of obstacles with small activation volumes and energies. Thermal energy enables them to cut through their obstacles and so to penetrate further into their walls, thereby reducing their back stress and enabling the Frank-Read sources, within the bands, to become active at lower applied stresses. The yield drop is explained as due to an overshooting, resulting from this thermally activated cutting, of the stress to operate the sources.     

Internal stress effect on grain-boundary diffusion in submicrocrystalline metals

Grain-boundary diffusion in the regime affected by internal stresses of triple-line disclinations is analysed. The concentration profiles in a stressed solid averaged over a distribution of hydrostatic stress gradients are calculated. It is shown that the stresses from triple-line disclinations in as-prepared submicrocrystalline metals can significantly increase the effective grain-boundary diffusion coefficient, which is obtained by fitting the concentration profiles to the solution of a diffusion equation for an unstressed polycrystal.     

Spiritual Development in the Fourth Quarter of Life

SUMMARY

Spirit, the activating or essential principle influencing a person, and body interpenetrate each other but do not dominate each other in predictable ways. Normal aging is neither a failure of the human spirit nor a failure in the body's Biology. The spirit becomes more apparent as a result of spiritual development.

The fourth quarter of life covers age 75 to 100 years. Prior to age 75, the human spirit undergoes significant developmental events: a crisis of meaning which may result in conversion or more commonly stripping or shedding; transitions, including loss of clearly defined roles and loss of the sense that the individual's life makes a difference.

One motif applied by our culture to old age is the “iconic illusion”; however, it is evident that in some respects this motif has limited application to the fourth quarter of life. “Meaning making” is, in fact, enhanced in the fourth quarter of life, given reasonable levels of cognitive health. The desire and ability to make sense out of existence, to draw together an understanding of a meaningful life trajectory, is best done in the fourth quarter of life. The dominant sense of time in the fourth quarter of life particularly facilitates spiritual development.     

Chapter 8: “Always Green and Full of Sap”: Facilitating Wholeness in Aging

SUMMARY

Wholeness in aging is difficult to define, especially in the face of physical disability or catastrophic illness. How one meets the challenges of aging depends upon numerous physical, emotional, and spiritual factors. Rehabilitation may play an important role in restoring wholeness to those with physical disabilities. Likewise, a physical fitness program may lessen some of the effects of aging, helping the older person maintain a higher quality of life. The lived theologies of the older patients and their caregivers also interact, providing an important ground of connection in rediscovery of wholeness as well. Ultimately, our most important role as healthcare providers is to help our older patients regain and maintain this multidimensional wholeness even in times of physical challenge.     

贪婪:态度、动机与决策机制

贪婪是人性的重要特点之一,也是哲学、经济学等领域经常讨论的话题.本文首先梳理了贪婪的概念,并将问题聚焦在对于物质的贪婪上.然后总结了贪婪的特点,并提出贪婪的定义.接着阐述了情境因素如何影响个体对贪婪的态度,以及贪婪动机如何影响自利行为.贪婪决策是个体决定是否做出贪婪行为的心理过程,受到自我意识和情绪的影响.贪婪决策过程模型整合了控制性、自动化两类加工方式,阐释了自利倾向与道德自觉相互作用的机制.本文对以上内容逐次进行讨论,并提出了未来研究的方向.     

儿童抑郁认知易感性的发展特点

相对稳定的负性认知特征会使个体容易发生抑郁,被称为抑郁认知易感性.文章总结并对比当前关于抑郁认知易感性的稳定性与可变性的观点,提出从儿童发展早期开始研究认知易感性因素的必要性.接着回顾消极归因方式、功能失调态度和冗思这三种认知易感性因素在儿童期的表现及其前期心理特征,试图找到抑郁认知易感性在个体发展中的连续性.建议今后探讨认知易感性因素在不同年龄的发展特点,关注发展早期认知易感性因素的测量.     

Self‐regulatory strength amplification through selective information processing

We propose and demonstrate that although depletion of self-regulatory strength is common, it is not inevitable. Four experiments show that under certain conditions, consumers can amplify their self-regulatory strength and, as a result, increase their ability to control their behavior. Experiments 1–3 examine the depleting effects of information processing by exposing dieters and nondieters to either cost or pleasure information about chocolate. The results of experiments 1–3 show that when dieters have the ability to monitor the costs of consumption, they are motivated to mobilize additional strength and increase their ability to self-regulate. In experiment 4 we show the practical implications of our work and show that dieters are better able to control their eating because they choose to focus more on the cost (versus pleasure) of consumption.     

Strength of faith and body image in Muslim and non-Muslim women

A questionnaire was completed by 98 Muslim and 91 non-Muslim Australian women to examine the relationship between Islam and body image. Path analyses revealed that for Muslim women (but not non-Muslim women) strength of religious faith was inversely related to body dissatisfaction, body self-objectification, and dietary restraint. These relationships were mediated by increased use of modest clothing and by reduced media consumption. These results are consistent with the proposition that adherence to Islam can indirectly protect women's body image from appearance-based public scrutiny and from exposure to Western media.     

社会认同与内、外群体态度的关系：群际威胁和群体情绪的中介作用

为探究社会认同、群际威胁和群体情绪如何同时影响内、外群体态度,本研究以中日撞船事件为考察蓝本向天津市431名大学生被试进行调查研究,结果发现：国家认同在认同威胁对两种群体态度的总影响和通过群体愤怒的间接影响中都起到负向的调节作用;群际威胁和群体情绪在社会认同与内、外群体态度之间具有显著中介作用。结论：国家认同在对群体态度的影响中起基础性作用,不同群际威胁与不同群体情绪相对应进而影响群体态度。